An industry veteran who has attended China Refrigeration for several years, Wang Yiren, vice president of the Asia-Pacific region for Emerson Climate Technologies, observed that this year he is seeing many new technologies that truly turn the concept of energy efficiency into reality.
Almost all exhibitors of China Refrigeration Expo 2008 had something substantial to show the industry, with many long-anticipated products finally being revealed.
Throughout the exhibition halls, green issues were prominent even if the approach differed from company to company. Some exhibitors focused on technology exchanges through technology seminars, others promoted green products, and some exhibitors even touting the design of their trade show pavilion. In the end, they all expressed the same message of saving energy and focusing on the environment.
Despite the success of this year’s expo, notable names were missing from the exhibitor list. Large refrigeration manufacturers like York, McQuay, and Gree skipped the show. One principal of a refrigeration enterprise said, under terms of anonymity, that its products did not have significant changes to show the industry, so the company did not feel the need to attend CR annually.
However, after 11 years of absence from the show, Daikin made an impressive return to the show with a large-scale pavilion that brought a refreshing atmosphere to the trade show floor. Daikin (China) personnel said they paid close attention to the planning of the CR exhibit, including publishing a Daikin Pavilion Guide to direct visitors through the displays and introduce them to the company’s household electronics, central air-conditioning, and other products for the global market.
Energy Efficiency Is the Driving Beat at CR
Almost all the multiunit manufacturers participated in the expo, including Daikin, Haier, Midea, TCL, Dong Yuan, Toshiba-Carrier, and Mitsubishi Electric. Variable frequency and capacity has therefore become one of the most-showed energy-saving technologies.
In its pavilion, Daikin displayed a full range of residential and commercial frequency-conversion products. Chen Yingwei, director of the promotion department of Daikin (China) Investment Co., told APPLIANCE that all Daikin’s products currently sold in China are frequency conversion products.
Midea introduced its Digital Dual-Sword Heat Recovery Central Air-Conditioning system, using variable-capacity and heat-recovery technologies, and usable as an air-conditioner as well as a water heater. Its high level of energy efficiency has made it the specified system in many high-end residential developments in Guangzhou, Shenzhen, and Foshan.
Heat pump technology was another hot spot of energy-saving in this expo. According to Li Yuandan, marketing director of Trane, his company introduced a full-range water source heat pump product line, including the RTWD, in 2008.
Trane actually installed a pool in its 200-m2 pavilion and put the four types of water chillers—the screw type of RTWD, three-stage centrifuge CVHG, scroll chiller, and water source heat pump chiller—into the center of the circular pool full of water. This intriguing exhibit showed the advantages of high efficiency, energy savings, and environment friendliness of Trane’s water source heat pump product, attracting many attendees to the pavilion.
Haier Group also showed its environment-friendly water source heat pump units.
As for the expansion of application of heat pump technology, Daikin demonstrated its Dual-Stage Compression VRV-Winter Heating High-Efficiency Heat Pump system, which has been regarded as “mysterious” in the industry. According to Chen Yingwei, the system combined the double advantages of heat pump technology and dual-stage compression technology, which can achieve strong heating in the minimum outdoor temperature of –25°C and its COP value was up to 3.5 when the temperature was –10°C. The system was launched in the Chinese market in February 2008 to replace more-traditional boilers or central heating in North China.
Chen Yingwei said that Daikin has also successfully developed a heat pump floor heating system and an Ecocute heat pump water heater system using the natural refrigerant CO2.
Accessory Industry has also launched new energy-saving products. Emerson Climate Technologies displayed its ultra-low-temperature digital scroll compressor series, which had reliable operation in temperatures as low as –15°C. Applications are said to achieve energy savings up to four times that of using standard electric heaters.
Danfoss Sanhua (Hangzhou) Micro Channel Heat Exchanger Co. launched a full-aluminum microchannel heat exchanger, capable of being used in higher-pressure systems. It was designed for small size and light weight, with 30% increased heat transfer performance. The heat exchanger already has applications in car air-conditioners and small household air-conditioners.
Danfoss Sanhua introduced a full-aluminum microchannel heat exchanger capable of being used in higher-pressure systems.
A Variety of Choices of Environmental Protection
The hottest topic at CR 2008 was still the use and choice of environmentally friendly refrigerants. Almost all China’s refrigerant suppliers participated in the expo, including Sinochem, Dongyue, DuPont, Honeywell, and Juhua.
Also on hand were Greenpeace and the German Technical Cooperation (GTZ), which organized a technical seminar on the “European Option of Natural Refrigerants and Its Significance to China” to carry out technical exchanges regarding development and applications of natural refrigerants. Fan Liping, Greenpeace’s corporate social responsibility program director, observed that natural refrigerants are getting increasing attention from the industry and users.
Some of the world’s leading refrigerant suppliers said at the CR Expo that they would actively develop more environmentally friendly new refrigerants. Diane Luiano Picho, global president of DuPont Fluoroproducts, spoke to APPLIANCE at CR to introduce the new HFO-1234yf refrigerant. The new refrigerant was jointly researched and developed by DuPont and Honeywell and is being tested and certified by automobile manufacturers.
Preliminary test data indicated that, compared with other existing refrigerant alternatives such as CO2 and HFC-152a, this product is safer and its greenhouse gas effect and ozone-depleting potential value were very low. The nature and properties of this product can achieve a perfect balance. Daikin said that currently more than 50% of its household products sold in Chinese markets have adopted environmentally friendly refrigerant 410A. Meanwhile, Daikin was also committed to develop more conducive environment products using natural refrigerants.
As a manifestation of the environmental protection concept, the recycling and reuse of refrigerant was also put on the formal agenda. According to the statistics provided by the organizer, nearly 30 exhibitors displayed the equipment related to the recycling and reuse of refrigerant. “Nowadays the maintenance section uses many of these types of equipment, especially the central air-conditioning industry. Most of the products’ refrigerants are now 134a,” staff for an enterprise producing recycling equipment said.